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  • Quasilinearization for resonant boundary-value problems with mixed boundary conditions 
    Sveikate, N.; Sadyrbaev, F. (Нелінійні коливання, 2014)
    We consider resonant problems of the type (i) x′′ + p(t)x′ + q(t)x = f (t, x, x′), (ii) x′(0) = 0, x(T) = 0, where p, q, f are continuous functions and the homogeneous problem (iii) x′′ + p(t)x′ + q(t)x = 0 with boundary-value ...
  • Quasilinear kinetic modelling of RMP penetration into a tokamak plasma 
    Heyn, M.F.; Ivanov, I.B.; Kasilov, S.V.; Kernbichler, W.; Leitner, P. (Вопросы атомной науки и техники, 2013)
    The linear as well as the quasilinear problem of RMP penetration in tokamaks is solved consistently with a particle and energy conserving collision operator. The new collision operator ensures the Onsager symmetry of the ...
  • Quasilinear theory of quantum Fermi liquid 
    Tsintsadze, Nodar L.; Alkhanishvili, Davit M. (Физика низких температур, 2016)
    Quasilinear theory of a weakly turbulent quantum Fermi liquid is presented. Landau's linear theory of Fermi liquids is generalized by consideration of weak nonlinear regime. A newly derived kinetic equation of the Fermi ...
  • Quasimomentum of an elementary excitation for a system of point bosons under zero boundary conditions 
    Tomchenko, M.D. (Доповіді НАН України, 2019)
    As is known, an elementary excitation of a many-particle system with boundaries is not characterized by a definite momentum. We obtain the formula for the quasimomentum of an elementary excitation for a one-dimensional system ...
  • Quasimonochromatic beam of parametric X-ray radiation for control of heavy elements 
    Shchagin, A.V.; Sanin, V.M.; Sotnikov, V.V.; Voronko, V.A.; Yegorov, A.M. (Вопросы атомной науки и техники, 2005)
    Possibility to use quasimonochromatic X-ray beam of parametric X-ray radiation (PXR) in the X-ray locator for control and location of heavy elements is considered. The locator should operate with a tunable quasimonochromatic ...
  • Quasi-one dimensional classical fluids 
    Percus, J.K.; Wang, Q.-H. (Condensed Matter Physics, 2003)
    We study the equilibrium statistical mechanics of simple fluids in narrow pores. A systematic expansion is made about a one-dimensional limit of this system. It starts with a density functional, constructed from ...
  • Quasiparticle electronic band structure of the alkali metal chalcogenides 
    Syrotyuk, S.V.; Shved, V.M. (Condensed Matter Physics, 2015)
    The electronic energy band spectra of the alkali metal chalcogenides M₂A (M: Li, Na, K, Rb; A: O, S, Se, Te) have been evaluated within the projector augmented waves (PAW) approach by means of the ABINIT code. The Kohn-Sham ...
  • Quasiparticles in the XXZ model 
    Lu, P.; Müller, G.; Karbach, M. (Condensed Matter Physics, 2009)
    The coordinate Bethe ansatz solutions of the XXZ model for a one-dimensional spin-1/2 chain are analyzed with focus on the statistical properties of the constituent quasiparticles. Emphasis is given to the special cases ...
  • Quasiparticle states driven by a scattering on the preformed electron pairs 
    Domanski, T. (Condensed Matter Physics, 2016)
    We analyze evolution of the single particle excitation spectrum of the underdoped cuprate superconductors near the anti-nodal region, considering temperatures below and and above the phase transition. We inspect the ...
  • Quasi-periodic changes of galactic cosmic ray anisotropy and intensity 
    Iskra, K.; Gil, A.; Modzelewska, R.; Alania, M.V. (Кинематика и физика небесных тел, 2006)
  • Quasi-relativistic center-of-mass variables in applications 
    Gaida, R.; Tretyak, V.; Yaremko, Yu. (Condensed Matter Physics, 1998)
    Collective center-of-mass variables are introduced in the Lagrangian formalism of the relativistic classical mechanics of directly interacting particles. It is shown that the transition to the Hamiltonian formalism leads ...
  • Quasi-simple secondary waves in a gas of quasi-particles 
    Khodusov, V.D. (Вопросы атомной науки и техники, 2001)
    The equations describing simple secondary waves are obtained in gas dynamics with conserved and non-conserved number of quasi-particles at interactions. The non-linearity parameter in phonon and magnon gas dynamics is ...
  • Quasistatic loading of Berea sandstone 
    Vakhnenko, V.O.; Vakhnenko, O.O.; TenCate, J.A.; Shankland, T.J. (2008)
    Запропонована феноменологiчна модель для опису властивостей напруження-деформацiя пiсковика пiд дiєю повiльного навантаження. Розглянута комбiнацiя трьох механiзмiв, якi пов’язуються з внутрiшнiми обмiнними процесами: ...
  • Quasi-stationary mode of the beam-plasma discharge 
    Dadyka, D.I.; Anisimov, I.O. (Вопросы атомной науки и техники, 2018)
    Results of the beam-plasma discharge simulation are presented for the plane 2D model. Simulation was carried out using non-relativistic electrostatic package. Elastic collisions between electrons and neutral molecules, ...
  • Quasi-stationary states of electrons interacting with strong electromagnetic field in two-barrier resonance tunnel nano-structure 
    Tkach, M.V.; Seti, Ju.O.; Voitsekhivska, O.M. (Condensed Matter Physics, 2012)
    An exact solution of non-stationary Schrodinger equation is obtained for a one-dimensional movement of electrons in an electromagnetic field with arbitrary intensity and frequency. Using it, the permeability coefficient ...
  • Quasi-stationary streamer propagation 
    Bolotov, O.; Kadolin, B.; Mankovskyi, S.; Ostroushko, V.; Pashchenko, I.; Taran, G.; Zavada, L. (Вопросы атомной науки и техники, 2015)
    The numerical simulations are carried out for the quasi-stationary stage of the axially symmetric streamer propagation and for the linear stage of its azimuthal perturbation development. The dependences of the streamer ...
  • Quasi steady-state distributions for collisional plasmas in the presence of energy and particle sources 
    Potapenko, I.F.; Karas, V.I. (Вопросы атомной науки и техники, 2005)
    The formation of a non-equilibrium distribution function (DF) of particles with the power-law interaction potentials is studied. Consideration is based on the non-linear kinetic equation of a Landau - Fokker - Planck type ...
  • Quasi-unit regularity and QB-rings 
    Jianghua Li; Xiaoqing Sun; Xiaoqin Shen; Shangping Wang (Український математичний журнал, 2012)
    Some relations for quasiunit regular rings and QB-rings, as well as for pseudounit regular rings and QB ∞-rings, are obtained. In the first part of the paper, we prove that (an exchange ring R is a QB-ring) ⟺ (whenever x ...
  • Quasi-valuation maps based on positive implicative ideals in BCK-algebras 
    Young Bae Jun; Kyoung Ja Lee; Seok Zun Song (Algebra and Discrete Mathematics, 2018)
    The notion of PI-quasi-valuation maps of a BCK-algebra is introduced, and related properties are investigated. The relationship between an I-quasi-valuation map and a PI-quasivaluation map is examined. Conditions for an ...
  • Quaternary semimagnetic Hg₁₋x₋yCdxMnySe crystals for optoelectronic application 
    Mazur, Yu.I.; Tarasov, G.G.; Kuzmenko, E.V.; Belyaev, A.E.; Hoerstel, W.; Kraak, W.; Masselink, W.T. (Semiconductor Physics Quantum Electronics & Optoelectronics, 1999)
    The peculiarities of the exchange interaction between the carrier spin and localized spin moments of magnetic ions in the close vicinity of semimetal-semiconductor transition have been studied on the example of semimagnetic ...